Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation
Figure 4
(Left) Images of the Shepp-Logan
phantom ( samples, reconstruction matrix) and (right)
gradient-echo images of the human brain in vivo (TR/TE = 500/8 ms, BW 80 Hz/pixel, FA ,
2 mm slice) reconstructed using zero-padding (zero), the extrapolation method
by Constable and Henkelman (comp), and the proposed method with first- and
second-order derivatives (TV2). For comparison, reconstructions from fully
sampled matrices are shown (full). Arrows = truncation
artifacts.
